I appreciate the willingness to troubleshoot, BUT I will just wait until you fix the issues everyone is facing. All plugins below (posted just so you have a reference point for fixing the v 5.4) work FINE with Contact Form 7 v 5.3.2:
Accessibility by UserWay
Advanced Custom Fields
Advanced Page Manager
AIOSEO – Video Sitemap
Akismet Anti-Spam
All in One SEO Pro
BackupBuddy
Classic Editor
Contact Form 7 v5.3.2 (works perfectly with all plugins)
Contact Form DB
Duplicator
Embed Plus for YouTube
EWWW Image Optimizer
Head, Footer and Post Injections
Health Check & Troubleshooting
Insert Headers and Footers
iThemes Security Pro
Kwayy HTML Sitemap
ManageWP – Worker
Markup (JSON-LD) structured in schema.org
OptinMonster
Perfmatters
***PHP Version: 7.4.3
Proxy Cache Purge
PublishPress Blocks
Redirection
Reduce Bounce Rate
Simple Local Avatars
Tweet This
Wistia WordPress Plugin
WordPress Database Backup
WordPress phpinfo()
WP Broken Link Status Checker
WP Force SSL
WP Google Search
WP Mail SMTP
WP-Optimize – Clean, Compress, Cache
***WordPress 5.7`
